Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8640775 | Multi-deployable subsea stack system | Johnnie E. Kotrla, Melvyn F. Whitby, David J. McWhorter | 2014-02-04 |
| 8365830 | Multi-deployable subsea stack system | Johnnie E. Kotrla, Melvyn F. Whitby, David J. McWhorter | 2013-02-05 |
| 7921917 | Multi-deployable subsea stack system | Johnnie E. Kotrla, Melvyn F. Whitby, David J. McWhorter | 2011-04-12 |